Electrical Box, Box Type Cable, Number of Gangs 1, Bracket Type 1/2 in Setback, Capacity 18 cu in, Material , Number of 1/2 In. Back Knockouts 0, Number of 1/2 In. Side Knockouts 0, Clamp Type -, Nominal Depth 2 13/16 in, Nominal Length 3 5/8 in, Nominal Width 2 1/4 in, Color Gray, Standards File E104681 and R9320, UL Standard 514-C